How can make JTextField display all ASCII character?

I am writing a java app. There is a Jtextfield . I need display some special character in this jtextfield such as ASCII code is 135(&#135), 164(&#164), 167(&#167) and so on. Thees characters whose ASCII code is 164, 167 can correctly display in spite of you set any font to this jtextfield. But the character whose ASCII code is 135 can`t correctly display. It display as a [];. Who knows and has some ideas?
Thx. Bob

Thx any way.
Now I found a another way to display the (char)135(display as "�").
First, i defined a static attribute :
public final static String ASCII_CODE_IS_135 = "�";
Then, When I need display the char, I display the static attribute value. I found the textfield almost can display all special character by this way in spite of using what font.
Thx again.

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